Attachment for piston-ring-grinding machines



Dec 1%, @923. 3,472,758

c. E. JOHNSON ATTACHMENT FOR PISTON RING GRINDING MACHINES Original- Filed Dec. 24. 1919 llll mun

, INVENTOR CHARLES: EJOHNSON ATr 011w CY Patented Dec. H8 119233.,

untrue snares AhTdlG'hlli-IENT FGR FXSTON-RJING-GBHEDING LZAGHKN Application filed December 2 1919, Serial lilo. 84116? Renewed April 17, 1315253. Serial To all whom it may concern Be it known that ll,CHARLES E. Jorrnson,

a citizen of the United States of America,

residing at Muskegon, in the county of designed to be applied to grinding ma-.

is chines, particularly for the purpose of facilitating the grinding of piston rings on the faces thereof. It is a primary object and purpose of the invention to construct an attachment by means of which piston rings may be taken one at a time from a quantity of rings and carried to proper position on a magnetic clutch, to which they may be fixed by energizing the chuck, after which the same may be ground by carrying a rapidly moving grinding wheel across the same, it being understood that the chuck likewise is rotating at comparatively high speed during the grinding operation. A further object of the invention is to conon struct a very simple yet thoroughly pracs tically operative attachment of this kind which, when applied to grinding machines,

makes it possible to grind piston rings without the employment of highly skilled labor as has been universally necessary before.

For an understanding oi the invention and the constructions embodying the same, reference may be had to the following description taken in connection with the accompanying drawings, in which;

Fig. 1 is a partial sectional and side ele: vation of a grinding machine havingmy invention applied thereto.

Fig. 2 is a plan view thereof.

Fig. 3 is a fragmentary vertical section taken substantially on the line 3-3 of Fig. 2' and 7 Pi 4 is a horizontal section taken substantiallynnthe line H of Fi 1.

till

parts in the diiiierent views of the drawing. The invention-is designed to be applied to a grinding machine, the frame or pedestal of which is indicated at 1. At the upper mounted on-a suitable shaft w ich may be shown. The trough serves. as a Like reference characters reter to like side or said pedestal a grinding wheel-2 is driven through a belt passing around a drive pulley 3 on the shaft. Any other means of'driving the grinding wheel ma,-

be used. Said grinding wheel may he CE moved back and forth with respect to the pedestal through the operation of a wheel a so as to carry the grinding wheel over a magnetic chuck 5 located underneath the grinding wheel. This chuck may be driven in any suitable manner so as to turn'about a vertical axis, gearingti being used to transmit motion from the cone drive pulley, indicated in Fig. 1, to the clutch.

A. bracket .7 is attached to the pedestal to one side of the magnetic chuck, the same being provided with a long sleeve in which a shaft 8 is mounted vertically for rotation. Adjacent the upper end of the shaft a thin circular metal plate 9 is secured in which, in the construction shown, four openings 10 are made at squall spaced'distances from each other. The p ate 9 passes just above and across the upper side or the chuck 5 and also above a horizontal fixed plate ll which may be supported in an desired manner as by attachment'to the racket 7. Plate ll comes closely adjacent the side of the chuck 5 and at one edge is curved to conform thereto, as indicated in" dotted lines 8" in 2. A bracket 12 is secured to the plate 11 and is turned in above the circular plate 9 for a distance terminating in an upwardly extending trough 13' which has two sides located at an angle to each other as to guide for a quantity of piston rings it which may be placed therein, one above the other being properly "positioned by their engagement against the sides of the trough.

'At the lower end of the rod 8, a dish 15 is secured having four notches-l6 in its edges in any of which a spring actuated pin 17 is adapted to engage. The notches lolare so positioned with respect to the openings 10 in plate 9 that whenever the pin 17 is engaged in a notch, one opening 10 comes directly beneath the column of piston rings located in the guide trough 13. Another of the openings is positioned so that its center its coincides substantially with the vertical axis of the magnetic chuck 5 while the remaining openings are located to one side of the plate 11 and the magnetic chuclr as shown in Fig. 2.

In operation the operator grasps the plate 9 and turns it so that the pin 17 disengages upper "her of openings in p from one notch 16 and seats in the nex'tlsuc ceedin notch. The plate is turned in a clockwise direction and the lowermost ring is taken from the column of rings located in the guide trough 13 and carried to the chuck 5. The chuck is then energized so that the ring is attached to the chuck b magnetic attraction. It is evident that with the grinding machine in operation the chuck and ring turn rapidly and when the grinding wheel is' brought across the ring the face of the ring is ground. The chuck may then be de-energized and the plate 9 turned again one quarter of a revolution whereupon the ground ring, as soon as it leaves the clutch, drops from the opening 10 to any suitable receptacle or guide therefor which may be provided to receive it, andthe next lowermost ring is moved from the column of rings to the chuck whereupon the grinding operation may be re eated. The operation may be repeated inde nitely as long as there are rings to be ground.

The construction is simple, with it the rings may be properly positioned on the chuck automatically with the turning of the plate 9 and the employment of skilled labor is more or less eliminated, so far as grinding the faces of piston rings is concerned. The detail of construction of the rin grinder are not fully set forth inasmuch as thesame are not novel with me and form no part of the present invention. The numlate 9 and notches in disk 15 may be varied and various other changes in minor detail of construction resorted to without departing from the invention which is defined in the appended claims and I consider'myself entitled to all modifications of structure which fall within the scope of said claims.

I claim: 1

'1. In combination, a support, a chuck having a horizontal upper face, means for mounting said chuck to turn about a vertical axis, a plate provided with a plurality of ring receiving op turn about a vertical axis, said plate extending over the face of the chuck, means for supporting a column of rings one over the other whereby the lowermost ofsaid rings may be received in an opening in the plate, and means for yieldingly stopping the plate in any one of a plurality of positions in any of which positions one of the openings in the plate is located to receive the lowermost enings mounted to of the rings in said column of rings and another of said openings in the plate is located directly over the upper face of the chuck, substantially as described.

2. In combination, a support, a chuck mounted on said support to turn about a vertical axis, a bracket attached to the support, a vertical shaft mounted for rotation on the bracket, a thin plate attached at the upper end of the shaft and formed with a plurality of openings therein each adapted to receive a ring, a disk attached to the lower end of the shaft and provided with a plurality of notches in its edges one for each opening in the plate, a spring pressed pin adapted to seat in any of said notches in the disk, a supporting plate located underneath the first plate and directly over which one of the openings in said first plate comes when said pin is seated in a notch in the disk, and a vertical trough shaped guide disposed over the first plate and carried by said supporting plate, said guide being adapted to position a column of rings located one over the other so that the lowermost ring of the column may pass into an opening in the first plate and be carried to and above the chuck on rotative movement of said vertical shaft about its axis, substan tially as described.

' 3. In combination, a support, a chuck having a horizontal upper face, means for mounting said chuck to turn about a vertical axis, a plate provided with a plurality of ring recelvin openings mounted to turn about a vertica axis, said plate extending over the upper face of the chuck, a supporting member attached to the support under the plate and extending beyond the edge of the plate, a vertical trough having two angularly positioned sides and open at one side supported by said su porting member in a position over and. slig tly spaced at its lower end from the plate, said trough being adapted to freely receive rings at its open side whereby a vertical column of ringsmay be guided by the trough, and a grinding wheel adapted to grind rings fixed on the chuck andwhich are successively carried to the chuck from the columuof rings by said plate, the openings in said plate successively receiving the lowermost ring of the column, substantially as described.

In testimony whereof I atfix my signature.

CHARLES E. JOHNSON. 

